A mason type analysis of cylindrical ultrasonic micromotors

Marc Budinger (1) , Jean-François Rouchon (1) , Bertrand Nogarède (1)

1 LEEI - Laboratoire électrotechnique et électronique industrielle

This paper deals with the global analytical modelling of cylindrical piezoelectric micromotors. The modelling, based on an equivalent electric circuit, is established by using geometrical and electromechanical parameters for the different parts of the motor. The motor stator is represented here in a form very similar to a traditional Mason circuit. The differences occur in the particular configurations of movement, namely flexural instead of longitudinal vibrations. In the equivalent circuits, contact between rotor and stator is represented by voltages which are functions of vibratory speed. Useful results for design can be obtained such as torque/speed curve, no load admittance, supply voltage, stress and amplitude of vibrations. This modelling is simple to implement and would also lend itself to optimisation by analytical methods because of the relatively small amount of computation required. 2 Abstract : This paper deals with the analytical modelling of piezoelectric cylindrical micromotors [1] and supplements kinematics analysis done by [2]. The modelling, based on an equivalent electric circuit, is established by using geometrical and electromechanical parameters for the different parts of the motor. It gives electromechanical characteristics and other useful values for motor design.

Mots clés: ultrasonic micromotor; TWUM; analytical modelling; equivalent circuit

Domaines: Energie électrique

Marc Budinger, Jean-François Rouchon, Bertrand Nogarède. A mason type analysis of cylindrical ultrasonic micromotors. European Physical Journal: Applied Physics, 2004, 25 (1), pp.57 - 65. ⟨10.1051/epjap:2003085⟩. ⟨hal-01861787⟩